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Date:	Sat, 12 Jul 2014 12:10:04 +0100
From:	Russell King - ARM Linux <>
To:	Daniel Thompson <>
Cc:	Paul Bolle <>,,
	Arnd Bergmann <>,,,,
Subject: Re: [PATCH v7 0/4] arm: Fix DEBUG_LL for multi-platform kernels
	(without PL01X)

On Sat, Jul 12, 2014 at 11:16:02AM +0100, Russell King - ARM Linux wrote:
> On Mon, Jun 30, 2014 at 12:30:51PM +0100, Daniel Thompson wrote:
> > This patchset removes some single-platform compatibility tricks related
> > to DEBUG_LL and, as a result, allows multi_v7_defconfig derived builds
> > to enable DEBUG_LL. Currently the user selected kbuild setting is
> > ignored and the PL01X's DEBUG_LL stub is silently selected instead. This
> > is a pain if your hardware doesn't have this cell, not least because it
> > takes a little time to figure out that kbuild built the wrong code.
> I don't think this is quite right, because I'm now seeing randconfig
> finding build errors with this.  We can end up with this configuration:
> # CONFIG_DEBUG_ICEDCC is not set
> # CONFIG_DEBUG_LL_UART_8250 is not set
> # CONFIG_DEBUG_LL_UART_PL01X is not set
> CONFIG_DEBUG_LL_INCLUDE="mach/debug-macro.S"
> # CONFIG_DEBUG_UART_8250 is not set
> which results in:
> arch/arm/kernel/debug.S:24:33: fatal error: mach/debug-macro.S: No such file or directory
> make[2]: *** [arch/arm/kernel/debug.o] Error 1
> arch/arm/kernel/head.S:27:33: fatal error: mach/debug-macro.S: No such file or directory
> make[2]: *** [arch/arm/kernel/head.o] Error 1
> Full config file:

Note that this also breaks building versatile as an oldconfig.  I'll drop
the patch series from my tree for the time being.

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